[go: up one dir, main page]

CN100342600C - Fiber laser, spontaneous emission light source and optical fiber amplifier - Google Patents

Fiber laser, spontaneous emission light source and optical fiber amplifier Download PDF

Info

Publication number
CN100342600C
CN100342600C CNB2004800010154A CN200480001015A CN100342600C CN 100342600 C CN100342600 C CN 100342600C CN B2004800010154 A CNB2004800010154 A CN B2004800010154A CN 200480001015 A CN200480001015 A CN 200480001015A CN 100342600 C CN100342600 C CN 100342600C
Authority
CN
China
Prior art keywords
optical fiber
fiber
wavestrips
glass
thulium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNB2004800010154A
Other languages
Chinese (zh)
Other versions
CN1701475A (en
Inventor
山田诚
青笹真一
阪本匡
森淳
鹿野弘二
清水诚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of CN1701475A publication Critical patent/CN1701475A/en
Application granted granted Critical
Publication of CN100342600C publication Critical patent/CN100342600C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06716—Fibre compositions or doping with active elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/1601—Solid materials characterised by an active (lasing) ion
    • H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
    • H01S3/1616—Solid materials characterised by an active (lasing) ion rare earth thulium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/17—Solid materials amorphous, e.g. glass
    • H01S3/175—Solid materials amorphous, e.g. glass phosphate glass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/17—Solid materials amorphous, e.g. glass
    • H01S3/176—Solid materials amorphous, e.g. glass silica or silicate glass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/16—Solid materials
    • H01S3/17—Solid materials amorphous, e.g. glass
    • H01S3/177—Solid materials amorphous, e.g. glass telluride glass

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

New fiber lasers, spontaneous emission sources, and optical fiber amplifiers are provided. Their conventional counterparts, which have a fiber doped with thulium (Tm) ions and excited by 0.67 mum or 0.8 mum pumping light, have a problem in that their characteristics are deteriorated with the elapse of time. The new fiber lasers, spontaneous emission sources, and optical fiber amplifiers use 1.2 mum light as pumping light. Alternatively, they use a pumping source for exciting the thulium from the lowest energy level 3H6 to 3H5 excitation level. As a more preferable configuration, they improve the emission efficiency at 2.3 mum band by disclosing Tm-doped host glass.

Description

Fiber laser, spontaneous emission light source and fiber amplifier
Technical field
The present invention relates to fiber laser, spontaneous emission light source and fiber amplifier, relate to especially and a kind ofly will mix the optical fiber of rare earth element as fiber laser, spontaneous emission light source and fiber amplifier gain media, that near 2 μ m wavestrips, work at core segment or clad section with laser transition energy level.
Background technology
Fig. 1 is the energy diagram (with reference to non-patent literature 1) of thulium ion, the numeral that arrow is given is the energy value on each energy level right side among Fig. 1, the title of each energy level in each energy level left side among Fig. 1 shows respectively when producing the transition of each arrow and just absorbs (among Fig. 1, be equivalent to arrow (not shown) upwards) or the optical wavelength of emission (among Fig. 1, with respect to downward arrow).But, energy unit is to be that basic 1/cm (with respect to the said K of spectroscopy (kayser)) represents with wave number unit, the energy level title adopts the statement method of Russell-Saunders (Russell's Saunders), the alphabet capitalization is represented synthetic orbital angular momentum, the numeral of its subscript interpolation is based on the multiple degree of the spectral cterm of total anglec of rotation momentum of electronics, the numeral full-shape momentum that its subscript is added.Have, because the division of the decline energy level that the Stark effect that produces because of crystalline electric field causes, each energy level is the energy level of wide cut again.
In fibre core, mixed in the optical fiber of thulium (Tm), inquired into the application of fiber laser, spontaneous emission light source and fiber amplifier among the Fig. 1 that uses thulium ion:
Use 3H 4→ 3H 6Transition (expression thulium ion energy be from 3H 4Energy level transition extremely 3H 6Energy level, below, all according to this statement method.) 1.9 μ m wavestrips;
Use 3F 4→ 3H 52.3 μ m wavestrips of transition;
Use 3F 4→ 3H 60.82 μ m wavestrip of transition;
Use 3F 4→ 3H 41.48 μ m wavestrips of transition.
Have again,,, can adopt fluoride fiber as the optical fiber of doping Tm (thulium) for high efficiency is implemented in fiber laser, spontaneous emission light source and fiber amplifier between the above-mentioned transition.In the fluoride fiber of this Tm that mixed, particularly, 2.3 μ m wavestrip is difficult in and produces vibration in the semiconductor laser, in addition, has huge commercial possibility now, lot of domestic and international medical examination device development enterprise competes thereby promote to develop in keen competition, and emphasis concentrates on as the light source that is used for detecting in the non-intruding mode blood glucose value.
Up to the present, reported:
(1) in the fluoride fiber of Tm that mixed, uses 0.67 μ m wavestrip and excite (general 3H 6The thulium ion of energy level is energized into 3F 3Energy level) (with reference to non-patent literature 1), the laser generation that produces 0.82 μ m wavestrip, 1.48 μ m wavestrips, 1.9 μ m wavestrips and 2.35 μ m wavestrips;
(2) in the fluoride fiber of Tm that mixed, use 0.8 μ m wavestrip and excite (general 3H 6The thulium ion of energy level excite into 3F 4Energy level) (with reference to non-patent literature 2 or patent documentation 1), the laser generation that produces 2.35 μ m wavestrips;
(3) in the fluoride fiber of Tm that mixed, use 0.8 (0.79) μ m wavestrip and excite (with reference to patent documentation 1), to produce the laser generation of 0.82 μ m wavestrip, 1.48 μ m wavestrips, 1.9 μ m wavestrips and 2.35 μ m wavestrips;
(4) in the fluoride fiber of Tm that mixed, application 1.55～1.75 μ m wavestrips excite (will 3H 6The thulium ion of energy level excite into 3H 4Energy level) (with reference to patent documentation 2), the laser generation and the fiber amplifier of 1.9 μ m wavestrips;
(5) in the fluoride fiber of Tm that mixed, use 1.06 μ m wavestrips and excite (with reference to patent documentation 2), producing the laser generation and the fiber amplifier of 1.48 μ m wavestrips,
According to above-mentioned report (1), (2) and (3), developed the fiber laser of 2.3 μ m wavestrips.
Patent documentation 1: the spy opens flat 3-293788 communique
Patent documentation 2: the spy opens flat 6-283798 communique
The people such as J.Y. Allain of Electron.Lett. (electronic letters, vol) the 25th volume the 24th phase 1660-1662 page or leaf of non-patent literature 1:1989 distribution " Tunnable CW lasing around0.82,1.48,1.88and 2.35 μ m in Thulium-doped fluorozirconate fiber (in thulium doped fluozirconate optical fiber, be transmitted near the tunable CW laser 0.82,1.48, the 1.88 and 2.35 μ m "
Electron.Lett. (electronic letters, vol) the 24th volume the 17th phase the 1104th page the people such as L. Esterowitz of non-patent literature 2:1988 distribution " Pulsed laser emission at 2.3 μ m ina Thulium-doped florozirconate fiber (the 2.3 μ m pulse lasers emission in thulium doped fluozirconate optical fiber "
The people's such as A.Taniguchi of Appl.Phys.Lett. (Applied Physics journal) the 81st volume the 20th phase 3723-3725 page or leaf of non-patent literature 3:2002 distribution " 1212-nm pumping of 2 μ m Tm-Ho-codoped silica fiber laser (codope has 1212 nanometers of 2 μ m silicon optical fiber laser of thulium-holmium to excite) "
The people's such as P.R.Barber of Opt.Lett. (optics journal) the 20th (21) the volume 2195-2197 page or leaf of non-patent literature 4:1995 distribution " Infrared-induced photodarkening inTm-doped fluoride fiber (the light deepening of the infrared induction in thulium doped fluoride fiber) "
Summary of the invention
But, report only be that 0.67 μ m or 0.8 μ m wavestrip are excited as active catalyst, adopt and to mix the thulium fluoride fiber, but not have the report of the thulium doped fiber of relevant other host glass of employing (mother metal).That is, so far, the optical fiber of the not clear host glass how to form is applicable to the laser of 2.3 μ m wavestrip work.
And, when the fluoride of mixing thulium is shone high light below 1.05 mum wavelengths, just produce the phenomenon of light deepening (with reference to non-patent literature 4) of the loss of so-called increase fluoride fiber itself.Fig. 2 show when to mix thulium fluoride fiber (doping content 2000wt.ppm, the long 20m of optical fiber, refractive index contrast 3.7%), light deepening 500mW, 1.047 μ m wavestrip Nd-YLF laser before loss spectrum (block curve) and the loss spectrum (dashed curve) after after this laser incident 56 hours.Loss amplification shown in this figure is because the incident of laser and produced defective in the glass of fluoride fiber, and this phenomenon will be remarkable more during more for the short wavelength in its incident wavelength.Thus, when considering to mix the thulium fluoride fiber, use under the situation of laser of 2.3 μ m wavestrip work by what adopt that 0.67 μ m or 0.8 μ m wavestrip excite, along with the time increases, its oscillation efficiency reduces, and will have the so-called problem that can not carry out the reliability aspect of laser generation at last.Thus, in the application of non-intruding blood sugar evaluating apparatus etc., utilize existing this light source, just can not obtain having the practical light source of reliability.
And, reported doping Tm when adopting 1.2 μ m wavestrips to excite 3+And Ho 3+The laser generation (with reference to non-patent literature 3) of 1.9 μ m wavestrips of fluoride fiber.But they all do not have to utilize from Tm 3+ 3H 4Arrive 3H 6Therefore the laser transition of energy level do not relate to the luminous of 2.3 μ m wavestrips.
Be used to solve the means of problem
The present invention In view of the foregoing, its main purpose is:
1) clear and definite be used for operating under the 2.3 μ m wavestrips the required thulium host glass of mixing, positively realized fiber laser, spontaneous luminescence (ASE) light source and the fiber amplifier under same wavestrip, operated, simultaneously,
2) can realize not the high reliability that optic fibre characteristic degenerated because of light deepening (Off オ ト ダ-Network ニ Application グ).
To achieve these goals, the present invention has following two features.
1), adopts glass with the non-decay of luminescence rate that causes by the multi-phonon decay lower than quartz glass as the required thulium host glass of mixing of under 2.3 μ m wavestrips, working.
2) for not because of the light deepening makes the optic fibre characteristic deterioration, the wavelength that excites as to the optical fiber input of doping Tm uses 1.2 μ m wavestrips.
The present invention can realize being applied to utilizing the utility unit of non-intruding blood sugar evaluating apparatus of this feature etc.
The invention effect
The present invention plays following effect according to above-mentioned feature.
1) as the host glass that adds Tm, owing to adopt the non-decay of luminescence rate glass lower that causes by the multi-phonon decay, so can be implemented in fiber laser, ASE light source (spontaneous luminescence light source) and the fiber amplifier of working under the 2.3 μ m wavestrips really than quartz glass.
2) owing to adopt 1.2 μ m wavestrips (1.2 μ m wavestrips excite) to be used as inciding the excitation wavelength in the thulium doped fiber, therefore just can realize having the high reliability and fiber laser, ASE light source and the fiber amplifier practical, that under 2.3 μ m wavestrips, operate that do not make the optic fibre characteristic deterioration because of the light deepening.
Brief description of drawings
Fig. 1 is the energy diagram of thulium ion;
Fig. 2 is the curve chart that the light deepening of thulium fluoride fiber is mixed in explanation;
Fig. 3 shows the curve chart of the non-decay of luminescence rate characteristic of various glass;
Fig. 4 shows the curve chart of the 2.3 μ m wavestrip spontaneous luminescence spectrum that 0.67 μ m wavestrip of the present invention excites;
Fig. 5 shows the curve chart of the 2.3 μ m wavestrip spontaneous luminescence spectrum that 0.8 μ m wavestrip of the present invention excites;
Fig. 6 shows the curve chart that 0.67 μ m wavestrip of the present invention excites the 2.3 μ m wavestrip spontaneous luminescence spectrum that excite with 0.8 μ m wavestrip;
Fig. 7 is that 1.2 μ m wavestrips of the present invention excite and mix Tm 3+Fluoride fiber and mix Tm 3+The spontaneous luminescence spectrogram of tellurides optical fiber;
Fig. 8 shows 1.2 μ m wavestrips of the present invention and excites and mix Tm 3+Alkalescence germanate (ゲ Le マ ン Suan salt) glass optical fiber, mix Tm 3+The colcogenide glass optical fiber, mix Tm 3+Bismuth glass optical fiber and mix Tm 3+The curve chart of the spontaneous luminescence spectrum of the sour glass optical fiber of fluorine phosphorus (Off Star リ Application);
Fig. 9 is the curve chart of the validity that excites of explanation 1.2 μ m wavestrips of the present invention;
Figure 10 shows the ideograph of the optical fiber laser structure of the first embodiment of the present invention;
Figure 11 A shows the curve chart of pass band filter characteristic of 2.3 μ m wavestrips of the first embodiment of the present invention;
Figure 11 B shows the curve chart of output characteristic of fiber laser of 1.8 μ m wavestrips of the first embodiment of the present invention;
Figure 12 shows the curve chart of output characteristic of fiber laser of 2.3 μ m wavestrips of the first embodiment of the present invention;
Figure 13 shows the schematic diagram of the fiber amplifier structure of the second embodiment of the present invention;
Figure 14 shows the schematic diagram of the spontaneous luminescence light-source structure of the third embodiment of the present invention.
Symbol description
1 mixes as the Tm of gain media 3+Optical fiber
2 1.2 μ m wavestrip excitation sources
3 dichronic mirrors
4 speculums
The band pass filter of 5 2.3 μ m wavestrips and 1.8 μ m wavestrips
6 collector lenses
7 completely reflecting mirrors
The best mode that is used to carry out an invention
Below, according to the feature 1 of the invention described above) and 2) describe in detail and be used to implement best mode of the present invention.
(about the explanation of feature 1 of the present invention)
As shown in Figure 1, mixed Tm optical fiber 2.3 μ m wavestrips fluorescence from 3F 4Laser transition is arrived 3H 5Energy level.In addition, under the situation of realization, be trapped in owing to prolonged based on the laser application of this transition 3F 4The residence time of the thulium ion of energy level (that is, prolonging fluorescence lifetime), just must be formed on 3F 4Energy level and 3H 5Counter-rotating between the energy level distributes.For this reason, reduce from 3F 4Energy level arrives 3H 5The thulium ion of the non-decay of luminescence of energy level is just extremely important.In Fig. 3, show the characteristic of the non-decay of luminescence rate of various glass.And, this non-luminous be because from 3F 4Energy level arrives 3H 5The multi-phonon decay of energy level causes.Fig. 3 shows, 3F 4Energy level and 3H 5Energy difference between the energy level is～4300 (1/cm), compares with quartz glass (silicate glass), and tellurite glass, alkaline germanate glass, fluoride glass, colcogenide glass have little non-decay of luminescence rate.In addition, though not shown among Fig. 3, to compare with quartz, bismuth glass and fluophosphate glass also have little non-decay of luminescence rate.According to this knowledge, the inventor makes the thulium doped fiber of different various host glasses, has surveyed the 2.3 μ m wavestrip spontaneous luminescence spectrum that 0.67 μ m wavestrip excites, 0.8 μ m wavestrip excites, and Fig. 4, Fig. 5, Fig. 6 show its result.
And the parameter of optical fiber is as used herein:
Mix doping content 2000wt.ppm, refractive index contrast 1.6%, cut-off wavelength 1.4 μ m, the fiber lengths 10m of thulium fluoride fiber: Tm
Mix thulium tellurides optical fiber: the doping content 2000wt.ppm of Tm, refractive index contrast 2.5%, cut-off wavelength 1.4 μ m, fiber lengths 10m
Mix thulium colcogenide glass optical fiber: the doping content 2000wt.ppm of Tm, refractive index contrast 1.0%, cut-off wavelength 1.5 μ m, fiber lengths 5m
Mix doping content 1500wt.ppm, refractive index contrast 1.1%, cut-off wavelength 1.3 μ m, the fiber lengths 10m of thulium alkalescence germanate glass optical fiber: Tm
Mix doping content 1500wt.ppm, refractive index contrast 1.8%, cut-off wavelength 1.2 μ m, the fiber lengths 10m of thulium silica fiber: Tm
Mix thulium bismuth glass optical fiber: the doping content 1000wt.ppm of Tm, refractive index contrast 2.5%, cut-off wavelength 1.43 μ m, fiber lengths 3m
Mix thulium fluophosphate glass optical fiber: the doping content 2500wt.ppm of Tm, refractive index contrast 1.1%, cut-off wavelength 1.36 μ m, fiber lengths 3.5m
Mix thulium phosphoric acid glass optical fiber: the doping content 1800wt.ppm of Tm, refractive index contrast 1.55%, cut-off wavelength 1.53 μ m, fiber lengths 2.9m
In addition, excite light quantity to be: 0.67 μ m wavestrip is 200mW, and 0.8 μ m wavestrip is 150mW.As Fig. 4, Fig. 5, shown in Figure 6, compare with quartz glass, in the tellurite glass optical fiber with little non-decay of luminescence rate, alkaline germanate glass optical fiber, fluoride fiber, colcogenide glass optical fiber, bismuth glass optical fiber and fluophosphate glass optical fiber, observe the spontaneous luminescence of 2.3 μ m wavestrips.On the other hand, at quartzy type optical fiber and have in the phosphoric acid glass optical fiber of the non-decay of luminescence rate bigger, can observe the spontaneous luminescence of 2.3 μ m wavestrips than quartz glass.Show that thus utilization will be compared the optical fiber of the little glass of the non-decay of luminescence rate that causes because of multi-phonon decay as host glass with quartz glass, just can access the fluorescence of 2.3 μ m wavestrips.That is, be appreciated that and utilize this fluorescence that as the glass matrix of the Tm that mixed, owing to adopted the non-decay of luminescence rate glass lower than quartz glass that causes because of the multi-phonon decay, it is possible obviously using at the laser of 2.3 mum wavelength scopes as can be known.
(explanation of feature 2 of the present invention)
At first, the laser that the 2.3 μ m wavestrips that excite about the 1.2 μ m wavestrips of utilizing to thulium doped fiber are described is used (fiber laser, spontaneous luminescence light source and image intensifer).Utilize 1.2 μ m wavestrips to excite, by at first being in 3H 6The thulium ion of ground state level is energized into 3H 5Energy level, decay to from this energy level by temporary transient nonradiative process 3H 4Energy level and from 3H 4Energy level is energized into 3F 2Energy level, will be in by nonradiative process at last 3F 2The thulium ion of energy level decays to 3F 4Energy level and 3F 4Energy level and 3H 5Form oppositely distribution between the energy level, realize laser application thus by these 2.3 μ m wavestrips that excite.(have, the past does not relate to the excitation wavelength that thulium doped fiber is incided in the conduct of adopting 1.2 μ m wavestrips (1.2 μ m wavestrips excite) fully again, realizes the report of the laser application (fiber laser, spontaneous luminescence light source and image intensifer) of 2.3 μ m wavestrips).
1.2 μ m wavestrips have been shown among Fig. 7 have excited doping Tm 3+Fluoride fiber and doping Tm 3+The spontaneous luminescence spectrum of tellurides optical fiber.As can be seen, produce 3F 4Energy level → 3H 5The 2.3 μ m wavestrips that energy level causes are (though photoluminescence peak is 2.05 μ m, but this is to utilize the exciting light volume production of 1.2 μ m wavestrips to give birth to displacement) spontaneous luminescence spectrum, what is called is utilized the light quantity that excites of 1.2 μ m wavestrips, by mix the thulium fluoride fiber, mixing thulium tellurite glass optical fiber, to produce fluorescence under 2.3 μ m wavestrips be the new understanding of the inventor, is that original institute was uncomprehending.And, be in the optical fiber mixing the thulium quartz, do not observe the fluorescence of 2.3 μ m wavestrips.
In addition, merging shows 1.2 μ m wavestrips and excites doping Tm among Fig. 8 3+Alkaline germanate glass optical fiber, doping Tm 3+Colcogenide glass optical fiber, doping Tm 3+Bismuth glass optical fiber and doping Tm 3+The spontaneous luminescence characteristic of fluophosphate glass optical fiber.This characteristic also excites doping Tm with 1.2 μ m wavestrips 3+Fluoride fiber and doping Tm 3+Tellurides optical fiber the same, be the new understanding of the inventor.Simultaneously as can be seen, with the explanation of the feature 1 of the invention described above clear and definite quartz glass compare, with glass with little non-decay of luminescence rate optical fiber, even 1.2 μ m wavestrips excite the fluorescence that also can obtain 2.3 μ m wavestrips as host glass.That is, being appreciated that by 1.2 μ m wavestrips to excite, is possible in the laser application of 2.3 μ m wavestrips.
And, though doping Tm about adopting 1.2 μ m wavestrips to excite 3+Fluoride fiber report not itself, but reported (non-patent literature 3) Tm that mixes simultaneously 3+And the laser generation of 1.9 μ m wavestrips of both codope Tm-Ho optical fiber of holmium (Ho).But this report is not utilized from Tm 3+ 3H 4To 3H 6The laser transition of energy level, and do not relate to 2.3 μ m wavestrips yet.
Then, the relevant high reliability that does not make the optic fibre characteristic deterioration because of the light deepening is described.Among Fig. 9, show semiconductor LD (laser diode) light loss spectrum (block curve) and the 100 hours loss spectrum (dashed curve) afterwards of this light of incident before of about 500mW of incident 1.21 μ m wavestrips in mixing thulium fluoride fiber (doping content 200wt.ppm, fiber lengths 20m, refractive index contrast 3.7%).As indicated in the result of Fig. 9, excite by adopting 1.2 μ m wavestrips, just can realize suppressing the light deepening that the loss of so-called fluoride fiber self increases, just can use the laser of 2.3 μ m wavestrips of practicality with high reliability.(and, in Fig. 9, though different before a plurality of exciting lights of incident with the spectrum after the 1.21 μ m wavestrip exciting light incidents, think that this is the error that certainty of measurement causes.)
And, in following table 1, show doping Tm 3+Tellurides optical fiber, doping Tm 3+Alkaline germanate glass optical fiber, doping Tm 3+Colcogenide glass optical fiber, doping Tm 3+Bismuth glass optical fiber and doping Tm 3+1.047 μ m wavestrips of fluophosphate glass optical fiber (use each optical fiber of the parameter of in the explanation hurdle of the feature 1 of the invention described above, representing and measure) excite the loss of the wavelength 600nm when exciting to change with 1.21 μ m wavestrips.Show according to this measurement result,, also improved the reliability that 1.2 μ m wavestrips excite effectively even for other glass optical fiber except that fluoride fiber.
Table 1
Optical fiber 1.047 the gain loss (wavelength 600nm) that μ m wavestrip excites (500mW, 56 hours) per unit afterwards (dB/m) 1.2 the gain loss (wavelength 600nm) that μ m wavestrip excites (500mW, 100 hours) per unit afterwards (dB/m)
Tellurite glass optical fiber 0.81 ＜0.01
The alkalescence germanate glass optical fiber 0.92 ＜0.01
The colcogenide glass optical fiber 0.77 ＜0.01
Bismuth glass optical fiber 0.71 ＜0.01
Fluophosphate glass optical fiber 0.85 ＜0.01
Below, specifically explaining the present invention with reference to accompanying drawing, the embodiments of the invention of following discloses are example of the present invention only, is not to be any qualification to scope of the present invention.
Embodiment 1
By embodiments of the invention 1 fiber laser that is applied to 2.3 μ m wavestrips and 1.8 μ m wavestrips of the present invention is described.The configuration structure of the first embodiment of the present invention has been shown among Figure 10.Here, the 1st, as the doping Tm of gain media 3+Optical fiber, 2 is that 1.2 μ m wavestrip excitation sources (are semiconductor laser, oscillation wavelength 1.21 μ m, maximum output 200mW), the 3rd, dichronic mirror (reflect 1.2 μ m wavestrips light, see through the light of 1.6～2.4 μ m wavestrips), the 4th, speculum (reflectivity 50%, 100% sees through the light of 1.2 μ m wavestrips under 1.6～2.4 μ m wavestrips), 5 is band pass filters (transmissison characteristic of identical filter has been shown among Figure 11 A and Figure 11 B) of 2.3 μ m wavestrips and 1.8 μ m wavestrips, the 6th, condenser, the 7th, completely reflecting mirror (1.6～2.4 μ m wavestrip reflection of light rates are more than 95%).As doping Tm 3+Optical fiber 1, use a kind of in the following various doped fibers of each exchange.
Used doping Tm 3+The parameter of optical fiber 1 be:
Mix doping content 2000wt.ppm, refractive index contrast 1.6%, cut-off wavelength 1.5 μ m, the fiber lengths 5m of thulium fluoride fiber: Tm
Mix thulium tellurides optical fiber: the doping content 2000wt.ppm of Tm, refractive index contrast 2.5%, cut-off wavelength 1.4 μ m, fiber lengths 5m
Mix thulium colcogenide glass optical fiber: the doping content 2000wt.ppm of Tm, refractive index contrast 1.0%, cut-off wavelength 1.5 μ m, fiber lengths 6m
Mix doping content 1500wt.ppm, refractive index contrast 1.1%, cut-off wavelength 1.3 μ m, the fiber lengths 5m of thulium alkalescence germanate glass optical fiber: Tm
Mix thulium bismuth glass optical fiber: the doping content 1000wt.ppm of Tm, refractive index contrast 2.5%, cut-off wavelength 1.43 μ m, fiber lengths 4.5m
Mix thulium fluophosphate glass optical fiber: the doping content 2500wt.ppm of Tm, refractive index contrast 1.1%, cut-off wavelength 1.36 μ m, fiber lengths 5.5m
Incide various doping Tm 3+1.2 μ m wavestrips of optical fiber 1 to excite light quantity be 50mW, under the situation of band pass filter as band pass filter 5 of using 2.3 μ m wavestrips (centre of homology wavelength 2.205 μ m), the laser generation that is achieved as follows respectively at 2.205 μ m: adopting the situation of the fluoride fiber of mixing thulium is 1.5mW, the situation that thulium tellurides optical fiber is mixed in employing is 2.2mW, the situation that thulium colcogenide glass optical fiber is mixed in employing is 0.6mW, the situation that thulium alkalescence germanate glass optical fiber is mixed in employing is 0.4mW, the situation that thulium bismuth glass optical fiber is mixed in employing is 1.3mW, the situation that thulium fluophosphate glass optical fiber is mixed in employing is 1.1mW.
And, it is 50mW that the 1.2 μ m wavestrips that incide the optical fiber of various doping Tm excite light quantity, when using under 1.8 μ m wavestrips (the centre of homology wavelength 1.801 μ m) situation of band pass filter as band pass filter 5, the laser generation that is achieved as follows respectively at 1.801 μ m: adopting the situation of mixing the thulium fluoride fiber is 2.4mW, the situation that thulium tellurides optical fiber is mixed in employing is 3.2mW, the situation that thulium colcogenide glass optical fiber is mixed in employing is 0.8mW, the situation that thulium alkalescence germanate glass optical fiber is mixed in employing is 0.7mW, the situation that thulium bismuth glass optical fiber is mixed in employing is 1.9mW, the situation that thulium fluophosphate glass optical fiber is mixed in employing is 1.4mW.
And, by band pass filter 5 is changed to tunable filter, just can be implemented in the laser generation under two wavelength region may of 2.3 μ m wavestrips and 1.8 μ m wavestrips, for example, thulium fluoride fiber and adjustable optical filter are mixed in employing, just can realize the Wavelength variable of 1.75～2.21 μ m wavestrips.
In addition, in Figure 12, show and adopt doping Tm in the present embodiment 3+The time stability (2.205 μ m lasers initially be output as 1.5mW) of output light quantity of fiber laser of fluoride fiber.Characteristic (laser same as described above is initially exported) when in addition, this figure also shows 0.67 μ m wavestrip in the lump and excites.Can confirm according to this result, excite, just can use fiber laser in high reliability ground by adopting 1.2 μ m wavestrips.
In addition, clear, mix thulium tellurides optical fiber, mix thulium colcogenide glass optical fiber, mix thulium alkalescence germanate glass optical fiber, mix thulium bismuth glass optical fiber and mix under the situation of thulium fluophosphate glass optical fiber even adopt, laser output light change after the work in 1000 hours also is in 10%, even in these glass, by using 1.2 μ m wavestrips to excite, also can realize high reliability.
Embodiment 2
Apply the present invention to the fiber amplifier of 2.3 μ m wavestrips with second embodiment of the present invention explanation.The structure of the second embodiment of the present invention has been shown among Figure 13.Here, the 1st, as the doping Tm of gain media 3+Optical fiber, 2 is 1.2 μ m wavestrip excitation sources (for semiconductor lasers, oscillation wavelength 1.21 μ m, maximum output 200mW), the 3rd, dichronic mirror (reflect 1.2 μ m wavestrips light, see through the light of 1.6～2.4 μ m wavestrips), the 6th, condenser.
Respectively with respect to the flashlight of 2.205 μ m,
The fluoride fiber (the doping content 2000wt.ppm of Tm, refractive index contrast 1.6%, fiber lengths 11m) of mixing thulium by employing can realize that as gain media 1 signal gain is 8.3dB (when 1.2 μ m wavestrips excites light quantity to be 62mW)
The tellurides optical fiber (the doping content 2000wt.ppm of Tm, refractive index contrast 2.5%, fiber lengths 5m) of mixing thulium by employing can realize that as gain media 1 signal gain is 5.8dB (when 1.2 μ m wavestrips excites light quantity to be 52mW)
The colcogenide glass optical fiber (the doping content 2000wt.ppm of Tm, refractive index contrast 1.0%, fiber lengths 5m) of mixing thulium by employing can realize that as gain media 1 signal gain is 3.8dB (when 1.2 μ m wavestrips excites light quantity to be 75mW)
The alkaline germanate glass optical fiber (the doping content 1500wt.ppm of Tm, refractive index contrast 1.1%, fiber lengths 6m) of mixing thulium by employing can realize that as gain media 1 signal gain is 2.7dB (when 1.2 μ m wavestrips excites light quantity to be 73mW)
Mix thulium bismuth glass optical fiber (the doping content 1000wt.ppm of Tm, refractive index contrast 2.5%, fiber lengths 5.5m) as gain media 1 by employing, can realize that signal gain is 4.7dB (when 1.2 μ m wavestrips excites light quantity to be 55mW)
Mix thulium hydrofluoric acid glass optical fiber (the doping content 2500wt.ppm of Tm, refractive index contrast 1.1%, fiber lengths 4.3m) as gain media 1 by employing, can realize that signal gain is 2.2dB (when 1.2 μ m wavestrips excites light quantity to be 86mW).
In addition, under the situation that adopts above-mentioned various thulium doped fibers, utilize above-mentioned shooting condition, even also can realize signal gain equally under 1.8 μ m wavestrips, realize following laser generation respectively: adopting the situation of mixing the thulium fluoride fiber is 6.2dB (wavelength 1.805 μ m), the situation that thulium tellurides optical fiber is mixed in employing is 5.1dB (wavelength 1.805 μ m), the situation that thulium colcogenide glass optical fiber is mixed in employing is 3.2dB (wavelength 1.805 μ m), the situation that the alkaline germanate glass optical fiber of thulium is mixed in employing is 3.2dB (wavelength 1.805 μ m), the situation that the bismuth glass optical fiber of thulium is mixed in employing is 7.5dB (wavelength 1.805 μ m), the situation that thulium fluophosphate glass optical fiber is mixed in employing is 2.8dB (wavelength 1.805 μ m).
Embodiment 3
Apply the present invention to the fiber amplifier of 2.3 μ m wavestrips with third embodiment of the present invention explanation.The structure of the third embodiment of the present invention has been shown among Figure 14.Here, the 1st, as the doping Tm of gain media 3+Optical fiber, 2 is 1.2 μ m wavestrip excitation sources (as semiconductor lasers, oscillation wavelength 1.21 μ m, maximum output 200mW), the 3rd, dichronic mirror (reflect 1.2 μ m wavestrips light, see through the light of 2.2 μ m wavestrips), the 6th, condenser.
Utilize the structure of Figure 14,, can obtain the Tm that mixes as above-mentioned Fig. 7, shown in Figure 8 3+Fluoride fiber, doping Tm 3+Tellurides optical fiber, doping Tm 3+Alkaline germanate glass optical fiber, doping Tm 3+Colcogenide glass optical fiber, doping Tm 3+Bismuth glass optical fiber and doping Tm 3+The various spontaneous luminescence characteristics of fluophosphate glass optical fiber.According to this characteristic, just can be implemented in the spontaneous luminescence light source of working under the 2.3 μ m wavestrips.In addition, Fig. 7, Fig. 8 show, can utilize the spontaneous luminescence in 2.3 μ m and the 1.8 μ m wavestrips.
(other execution mode)
In above-mentioned first～the 3rd embodiment,,, also can adopt other the light source such as fibre Raman laser of 1.2 μ m wavestrips though adopted semiconductor laser as excitation source.
And; though for example understand preferred forms of the present invention; but embodiments of the present invention are not limited to above-mentioned giving an example; if in the scope of being put down in writing in claim scope required for protection, the displacement of this structure member etc., change, additional, the increase and decrease of quantity, the various distortion such as change of shape comprise in embodiments of the present invention all.
The feasibility of utilizing on the industry
Now, the non-intrusion type blood glucose value detects has huge commercial promise, and the medical examination device exploitation enterprise of lot of domestic and international competes thereby promoted to develop in keen competition. In this non-intrusion type blood glucose value detected, 2.3 μ m wavestrips were that the hope of glucose checks one of wavelength zone, thereby the light source of working is developed in an urgent demand under this wavelength. So far, as the light source of under this wavelength zone, working, be difficult to make semiconductor LD vibration. Adopt optical fiber laser or the spontaneous luminescence light source of mixing the thulium fluoride fiber although develop, owing to can adopt 1.05 μ m following 0.67 μ m or 0.8 μ m to be used as exciting light, therefore will exist to produce the dimmed phenomenon of light. Therefore, As time goes on, the output light of 2.3 μ m wavestrips can reduce, and finally will have the integrity problem of so-called no-output. The present invention does not make the deteriorated high reliability of optic fibre characteristic, optical fiber laser, ASE light source and fiber amplifier practical, that work owing to realizing having under 2.3 μ m wavestrip zones because light is dimmed, therefore very practical.

Claims (12)

1. fiber laser will mix the optical fiber of rare earth element with laser transition energy level as gain media at core segment or clad section, it is characterized in that,
At least be doped with thulium in the above-mentioned optical fiber, the light that adopts 1.2 μ m wavestrips is as excitation source, and works in 2.3 μ m wavestrips at least; With
Be doped with the quartzy type optical fiber of above-mentioned optical fiber right and wrong of above-mentioned thulium, it adopts the glass with non-decay of luminescence rate of by multi-phonon decay being caused lower than quartz glass as fibre-optical substrate glass.
2. fiber laser according to claim 1, it is characterized in that above-mentioned non-quartzy type optical fiber is any in fluoride fiber, tellurite glass optical fiber, bismuth glass optical fiber, fluophosphate glass optical fiber, colcogenide glass optical fiber, the alkaline germanate glass optical fiber.
3. fiber laser according to claim 1 and 2 is characterized in that, adopts certainly at least 3F 4Arrive 3H 5The laser transition of energy level.
4. fiber laser according to claim 1 and 2 is characterized in that, in 2.3 μ m wavestrips and two wavestrip work of 1.8 μ m wavestrips.
5. spontaneous emission light source will mix the optical fiber of rare earth element with laser transition energy level as gain media at core segment or clad section, it is characterized in that,
At least the light that is doped with thulium in above-mentioned optical fiber, adopts 1.2 μ m wavestrips is as excitation source, and at least in the work of 2.3 μ m wavestrips,
Be doped with the quartzy type optical fiber of above-mentioned optical fiber right and wrong of above-mentioned thulium, it adopts the glass with non-decay of luminescence rate of by multi-phonon decay being caused lower than quartz glass as fibre-optical substrate glass.
6. spontaneous emission light source according to claim 5, it is characterized in that above-mentioned non-quartzy type optical fiber is any in fluoride fiber, tellurite glass optical fiber, bismuth glass optical fiber, fluophosphate glass optical fiber, colcogenide glass optical fiber, the alkaline germanate glass optical fiber.
7. according to claim 5 or 6 described spontaneous emission light sources, it is characterized in that, adopt certainly at least 3F 4Arrive 3H 5The laser transition of energy level.
8. according to claim 5 or 6 described spontaneous emission light sources, it is characterized in that, in two wavestrip work of 2.3 μ m wavestrips and 1.8 μ m wavestrips.
9. fiber amplifier will mix the optical fiber of rare earth element with laser transition energy level as gain media at core segment or clad section, it is characterized in that,
At least be doped with thulium in above-mentioned optical fiber, the light that adopts 1.2 μ m wavestrips is as excitation source, and works in 2.3 μ m wavestrips at least;
Be doped with the quartzy type optical fiber of above-mentioned optical fiber right and wrong of above-mentioned thulium, it adopts the glass with non-decay of luminescence rate of by multi-phonon decay being caused lower than quartz glass as fibre-optical substrate glass.
10. fiber amplifier according to claim 9, it is characterized in that above-mentioned non-quartzy type optical fiber is any in fluoride fiber, tellurite glass optical fiber, bismuth glass optical fiber, fluophosphate glass optical fiber, colcogenide glass optical fiber, the alkaline germanate glass optical fiber.
11. according to claim 9 or 10 described fiber amplifiers, it is characterized in that, adopt certainly at least 3F 4Arrive 3H 5The laser transition of energy level.
12. according to claim 9 or 10 described fiber amplifiers, it is characterized in that, in two wavestrip work of 2.3 μ m wavestrips and 1.8 μ m wavestrips.
CNB2004800010154A 2003-07-28 2004-07-27 Fiber laser, spontaneous emission light source and optical fiber amplifier Expired - Lifetime CN100342600C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003281212 2003-07-28
JP281212/2003 2003-07-28

Publications (2)

Publication Number Publication Date
CN1701475A CN1701475A (en) 2005-11-23
CN100342600C true CN100342600C (en) 2007-10-10

Family

ID=34100924

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004800010154A Expired - Lifetime CN100342600C (en) 2003-07-28 2004-07-27 Fiber laser, spontaneous emission light source and optical fiber amplifier

Country Status (6)

Country Link
US (1) US7313306B2 (en)
EP (1) EP1650840B1 (en)
JP (1) JP3923994B2 (en)
CN (1) CN100342600C (en)
DE (1) DE602004024786D1 (en)
WO (1) WO2005011073A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144633B2 (en) 2002-07-29 2006-12-05 Evanite Fiber Corporation Glass compositions
US7515332B2 (en) * 2004-02-18 2009-04-07 Nippon Sheet Glass Company, Limited Glass composition that emits fluorescence in infrared wavelength region and method of amplifying signal light using the same
US7742224B1 (en) * 2004-12-15 2010-06-22 Sprint Communications Company, L.P. Optical amplification in the 850 nm window
JP4568188B2 (en) * 2005-08-10 2010-10-27 日本電信電話株式会社 ASE light source
JP2007287995A (en) * 2006-04-18 2007-11-01 Central Glass Co Ltd Ase light source
EP2763247A3 (en) * 2006-05-11 2014-09-17 SPI Lasers UK Limited Apparatus for providing optical radiation
US7298547B1 (en) * 2006-09-07 2007-11-20 Np Photonics Inc. 2-μm fiber amplified spontaneous emission (ASE) source
KR20140001116U (en) * 2011-05-03 2014-02-20 아이피지 포토닉스 코포레이션 2 high power single mode fiber laser system for wavelengths operating in 2 range
CN109103736B (en) * 2018-10-31 2024-04-09 深圳技术大学 High-power broadband full-optical fiber medium-infrared super-fluorescent light source
US11276982B2 (en) 2020-01-22 2022-03-15 Cybel, LLC. Optical fiber amplifier for operation in two micron wavelength region
US11509109B2 (en) 2020-03-09 2022-11-22 Cybel, LLC. Broadband Tm-doped optical fiber amplifier
US11509108B2 (en) 2020-05-01 2022-11-22 Cybel, LLC. Tm-doped fiber amplifier utilizing wavelength conditioning for broadband performance
US11670903B2 (en) 2020-05-19 2023-06-06 Cybel, LLC. Broadband hybrid optical amplifier operation in eye-safe wavelength region
CN112688146A (en) * 2020-12-25 2021-04-20 中红外激光研究院(江苏)有限公司 1064nm intracavity pumped 2.3 mu m thulium-doped solid laser
CN114477764B (en) * 2022-01-26 2023-04-21 华南理工大学 A bismuth-thulium co-doped gain glass with high-efficiency broadband and preparation method thereof
CN117317792B (en) * 2023-11-29 2024-02-23 长春理工大学 A ground-state induced excited-state hybrid pump mid-infrared laser

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967416A (en) * 1990-02-28 1990-10-30 The United States Of America As Represented By The Secretary Of The Navy Thulium-doped fluorozirconate fiber laser pumped by a diode laser source
JPH04180279A (en) * 1990-11-15 1992-06-26 Sumitomo Electric Ind Ltd Optical amplification device and optical oscillation device
JP2002299731A (en) * 2001-04-03 2002-10-11 Nippon Telegr & Teleph Corp <Ntt> Amplifier for optical fiber

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03293788A (en) 1990-04-12 1991-12-25 Nippon Telegr & Teleph Corp <Ntt> Optical fiber type laser
JPH06283798A (en) 1993-03-30 1994-10-07 Nippon Telegr & Teleph Corp <Ntt> Fiber laser and optical fiber amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967416A (en) * 1990-02-28 1990-10-30 The United States Of America As Represented By The Secretary Of The Navy Thulium-doped fluorozirconate fiber laser pumped by a diode laser source
JPH04180279A (en) * 1990-11-15 1992-06-26 Sumitomo Electric Ind Ltd Optical amplification device and optical oscillation device
JP2002299731A (en) * 2001-04-03 2002-10-11 Nippon Telegr & Teleph Corp <Ntt> Amplifier for optical fiber

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HIGHLY EFFICIENT AND TUNABLE OPERTATION OFTWO COLOUR-TM-DOPED FLUORIDE FIBER LASER PERCIVAL,R.M. ET AL,ELECTRONICS LETTERS,Vol.28 No.7 1992 *
KOIDOCHU SEKIGAI FIBER LASER SATOMI SUMIYOSHI,JAPANESE JOURNAL OF OPTICS,Vol.28 No.8 1999 *

Also Published As

Publication number Publication date
US7313306B2 (en) 2007-12-25
CN1701475A (en) 2005-11-23
JPWO2005011073A1 (en) 2006-09-14
EP1650840A1 (en) 2006-04-26
WO2005011073A1 (en) 2005-02-03
EP1650840A4 (en) 2007-08-22
JP3923994B2 (en) 2007-06-06
DE602004024786D1 (en) 2010-02-04
EP1650840B1 (en) 2009-12-23
US20060050367A1 (en) 2006-03-09

Similar Documents

Publication Publication Date Title
CN100342600C (en) Fiber laser, spontaneous emission light source and optical fiber amplifier
CN1399809A (en) Dual wavelength pumped waveguide amplifier
CN1334981A (en) Semiconductor-solid state laser optical waveguide pump device and method
CN103606808A (en) Medium-infrared fiber laser for dual-wavelength cascading pumping
US7944954B2 (en) Laser apparatus with all optical-fiber
JP3836130B2 (en) Doped optical waveguide amplifier
CN116742463B (en) Intermediate infrared laser of dual-wavelength pumping bonding crystal
CN101326690A (en) Optically pumped waveguide laser with a tapered waveguide section
KR100406527B1 (en) Holmium-doped optical fiber composition, optical fiber and optical amplifier
CN1372163A (en) Thulium doped optical fibre amplifier for raising conversion efficiency of S-bandwidth by pumping light
CN1844732A (en) Watt-level broadband Yb-doped photonic crystal fiber superfluorescent light source
Tikhomirov et al. Er 3+ doped ultra-transparent oxy-fluoride glass-ceramics for application in the 1.54 μm telecommunication window
Pask et al. A Pr3+-doped ZBLAN fibre upconversion laser pumped by an Yb3+-doped silica fibre laser
CN1397832A (en) Polarized wave retaining optical fiber enlarged and optical enlarger
Li et al. Highly efficient holmium fibre laser diode pumped at 1.94 µm
CN1248378C (en) Cascade raman laser
CN1527120A (en) Doped ring amplifying fibers and amplifiers containing such fibers
CN109252219A (en) A kind of ytterbium holmium dysprosium three mixes novel mid-infrared laser crystal of lead fluoride and preparation method thereof
CN1051794A (en) A kind of active-fibre optical amplifier and relevant Active Optical Fiber with wide excitation frequency band
CN1269915A (en) Glass for high and flat gain 1.55 micros optical amplifiers
JP2004288840A (en) Infrared laser light source
CN113480172A (en) Preparation method of holmium and neodymium co-doped fluorine-aluminum glass capable of realizing 3.9 micron luminescence
CN1683945A (en) Optical amplification fiber, optical fiber amplifier, and optical communication system
CN2842453Y (en) Optical-fiber super-radiation light source
CN1317574C (en) Nanocrystal Quantum Dot Fiber and Fiber Amplifier

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20071010

CX01 Expiry of patent term